I urgently need to prepare these sentences for tomorrow.

Could you please have a look at them?

1.If they told me to clean my room, I would.
2.You’d better take the keys in case I might still be out when you come back.
3. Would all this have happened if he hadn’t acted as the superman of the underground?
4.His son would not be alive now, if Mr. Queen hadn’t risked his life to save him.
5.You shouldn’t have been so rude to your mother.
6.Who was driving the car last night? A friend of my sister’s
7.I’m throwing a party on Saturday. Would you like to come?
8.What’s the matter with you? Why are you looking at me in this way?
9.When John arrived at the hospital, the doctors decided it was such a difficult case that they would have to consult a specialist in San Francisco.
10.While I was going out yesterday morning, Janet gave me a letter. I read a few lines, but then I realized I so late for school that I rushed to the bus stop
11.When the concert started, we had been sitting in the sun for hours.
12.The following morning I told my mum about the cold I had felt but she replied/answered that dad had checked all the rooms before we moved in.
13.I chose a room at the back of the house because it was beautiful and I was far (away) from all the others.
14.He could not deny that my room was ice-cold.

All are fine.

Sure, I'd be happy to help you with these sentences. Here is a review of each sentence along with an explanation of how to get the answer:

1. If they told me to clean my room, I would.
This is a conditional sentence expressing a hypothetical situation. The answer is already provided within the sentence – if they tell me to clean my room, I would do it.

2. You’d better take the keys in case I might still be out when you come back.
This sentence implies a suggestion or recommendation. The answer is also stated within the sentence – you should take the keys in case I am still out when you come back.

3. Would all this have happened if he hadn’t acted as the superman of the underground?
This sentence poses a rhetorical question. To determine the answer, you need to consider whether the described events would have occurred if he hadn't acted as the superman of the underground.

4. His son would not be alive now if Mr. Queen hadn’t risked his life to save him.
This is a conditional sentence expressing a past unreal condition. The answer is presented in the sentence – Mr. Queen risked his life to save his son, which is why his son is alive now.

5. You shouldn’t have been so rude to your mother.
This sentence expresses regret about a past action. The answer is straightforward – you should not have been rude to your mother.

6. Who was driving the car last night? A friend of my sister’s.
This is a question about the person who was driving the car. The answer is given in the response – a friend of my sister's.

7. I’m throwing a party on Saturday. Would you like to come?
This sentence is an invitation. The answer depends on your desire to attend the party – do you want to go or not?

8. What’s the matter with you? Why are you looking at me in this way?
This sentence asks for a reason or explanation. The answer is related to the question – what is the reason for looking at the person in a particular way.

9. When John arrived at the hospital, the doctors decided it was such a difficult case that they would have to consult a specialist in San Francisco.
This sentence describes a decision made by doctors based on a situation. The answer can be derived from the sentence – the doctors decided to consult a specialist in San Francisco due to the difficulty of the case.

10. While I was going out yesterday morning, Janet gave me a letter. I read a few lines, but then I realized I was so late for school that I rushed to the bus stop.
This sentence describes a sequence of actions. The answer can be obtained by understanding the events – while going out, Janet gave a letter, which led to reading a few lines, and realizing being late for school, resulting in rushing to the bus stop.

11. When the concert started, we had been sitting in the sun for hours.
This sentence refers to a past event and describes a duration of time. The answer is evident – when the concert started, they had been sitting in the sun for hours.

12. The following morning I told my mum about the cold I had felt, but she replied/answered that dad had checked all the rooms before we moved in.
This sentence describes a conversation between the speaker and their mother. The answer can be found in the response – the mother said that the dad had checked all the rooms before they moved in.

13. I chose a room at the back of the house because it was beautiful, and I was far (away) from all the others.
This sentence explains the reason for choosing a particular room. The answer is presented in the sentence – the speaker chose a room at the back of the house because it was beautiful and far away from the other rooms.

14. He could not deny that my room was ice-cold.
This sentence implies that the person could not refute a certain fact. The answer is given – they couldn't deny that the speaker's room was ice-cold.